Variable-speed transmission mechanism.



Nd. 846,182. PATENTED MAR. 5, 1907.

J. H. BOUGHTON.

VARIABLE SPEED-TRANSMISSION MECHANISM.

APPLICATION FILED AUG. 2,1906.

INVENTOR,

ATTORNEY- To all whom it may concern:

Be it known that LJUnsoN H. BoUGHToN, a citizen of the United States,residing at. York, in the county of New'Yor-k, and Stateof New-Yo1'k,.hazve invented certain new and useful "1m Speed TransmissionMechanism, of which the following is a specification. My inventionrelates able-speed transmission mechanism susceptible of simple andcompact construction, and more especially adapted for use onself-propelled vehicles or boats, by means 'of which reversal of motionand change-of speed may 7 e effected by a simple movement of thecontrolling lever or levers and without undue jar, shock, or strain. 7In its generic nature my invention com-' prehends a combination ofannular, sun, and planet, gears, together with a band-brake, clutch, andother necessary parts arranged to transmit from a motor or other p shaftmotion varying from zero to full speed 4 in one direction, the latterproduced by'a condition of positive contact,'and from z ero all at thewill of the o erator.

My invention inclu es 9. means of allowing the motor-shaft to rotatefreely without 1mparting motion to the sprocket-wheel of thetransmission from which power is to be taken; a means of imparting tothe sprocket-'- ition of positive contact.

:The invention comprises the eculiar construction and arrangement 0fixedly attached to a motor-shaft which drives an annular gear orfollower loosely mounted on the shaft through interposed follower, andthese are properly restrained and controlled bya band-brake and a conebrake, res ectively. I 3 q the accompanying drawings, Figure 1 is' acentralvertical longitudinal section'of my variable-speed mechanism.Fig. -2 is a cen- UNITED STATES PATENT OFFICE. Jonson H. BOUGHTON, orNEW YORK, N. Y. I VARIABLE-SPEED TRAIFI SMISISION MECHANISM.

' Specification of Letters Patent.

Patented March 5, 1807.

Application filed August 2,1906. seriaimezsoaa provements in Varia bletoan improved varie a sun-gear withou to follower,

taohed to shafts 4,:which brake-wheel I mounted on the shaft 1 and has asleeve ex- The clutch-disk 6 is mounted on'the sleeve extension ll andis prevented from revolving thereon by the key 10; but at the same timeit may be axially moved on the sleeve so as to engage the clutch wheelsor tension 1 1.

it permits -the motor-shaft 1 to tral vertical section the upper portionof which is taken on the line a-a,-the right-hand portion on lines 56,and the lower portion on lines 0 0; Figs. 3, 4, and 5, views of thedifferent elements in operative H relation, and Fig. 6 view of theinner'side of the clutch disk. x v In constructingmy invention I providethe usual motor-shaft, on which is'rigidly diagrammatic keyed adriving-pinion or sun-gear 2, meshing with t may be two or more, four ofthem beingshown herein. in turn with the internal-toothed annular gear8, which is loosely mounted on shaft 1 and from which power is deliveredby the sprocket-wheel 9or means and are supported by'and fixedly a'theplanet-gears 3, of which there These planet-gears 3 mesh by any othersuitable they restm these recesses, and thusprovide hey were permittedto bear against the rim of the disks. I usual band-brake 12 on thebrake-wheel 7.

e transmission mechanism operates as follows: When-the planet-gears3'are free to rotate about their res eotive axes and when thebrake-wheel 7,w ich supports them, is free to rotate about themotor-shaft 1, the latter may be driven at any speed without impartinmotion to the annular gear 8, to whichthe sprocket-wheel 9 is fixedlyattached. Diagram Fig. 3 represents this condition which obtains whenboth the bandi brake 12 and the clutch 6: are disengaged, and

I also provide the be driven aifectmg the said annular'gear or Ifwhenthe saidshaft '1 lsrevolvin'g'the c'ontrolling-l'ever' be moved sothat thelc'lutch-disk -6 gradually engages the, clutch-con eir a'xialrotation, agradually-incrasin motion in the same direction will beimparte ito the annular, ea1 8'until finally when the axial rotation othe .said clutch-cones 5, entimely ceases, with'a condition ofpositive.to each other.

contact with the said clutch-disks 6,.the'said annular gear 8 willassume an annular speed egual to that of the driving-gear 2, all partsthe transmission being at rest with respect If when the shaft 1 isrevolving, as in Diagram 5, the controlling-lever be moved so that withthe clutch 5 .6

disengaged the bandbrake l2will grip the brake-wheel 7 withgradually-increasing pressure, tending to retard the revolution of thesaid wheel 7, gradually increasing motion will be imparted to theannular gear 8 and follower througlrthe planet-gears 3, but in areversed direction, until finally when the wheel 7 entirely ceases torevolve about its axis a condition of positive contact Wlll prevail andthe annular gear 8 and follower will be 4 driven in the reverseddirection at a speed reduced to the ratio of the number of teeth of thedriving sun-gear 2 to those of the annular gear 8.

While I prefer to arrange the various parts as shown and described, itis obvious that the details of construction may be modi fied withoutdeparting from the spirit of my invention.

What I clalm as new is 1. A variable-speed mechanism oompris-' ing amotor-shaft, a sun-gear mounted to rotate therewith, a loosely-mountedbrake; wheel adjacent said sunear, planet-gears mounted on said brake-weel and meshing with said sun-gear, disks mounted 'to'rotate with saidplanet-gears, an annular gear having internal teeth meshing with saidplanetgears, and means for enga ing the peripheries of said disks tovary the speed ofsaid planet-gears.

2. A variable-speed mechanism comprising a motor-shaft, a sunear mountedto rotate therewith, loosely=mounted brakewheel adjacent said sunear,planet-gears mounted on said brakeheel and meshing with said sun-gears,disks mounted to rotate with said planet-gh are, an internally toothedear meshing wit said planet-gears, means or h'oldingthe brake-wheel fromrotation, and means engaging the peripheries of said 'disks topreventrotation of said planet-a gears. V

3. A varlable-speed mechanism eompr1singa motor-shaft, a sunear mountedto 'ro-" tate therewith, a loosely-mounted brake- Wheei adjacent saidsun-gear, planet-gears mounted on saidv brake-wheel and meshing withsaid sun-gear, disks mounted to rotate with said planet-gears, aninternally-toothed gear meshing with said planet-gears, means forholding the brake-wheel from rotation," and a clutch-wheel for engagingthe peripheries of said disks to prevent ation of said planet-gears.

4. A variable-speed. mechanism comprising a motor-shaft, a sunearmounted to rotate therewith, a loose y-mounted brakewheel adjacent saidsunear, planet-gears mounted on said brakeeel and meshing with said sungear, disks mounted to rotate with said planetears, aninternally-toothed gear meshing wit said planet-gears, means shaft, andalso engagingwith the planetgears, and a clu-tohd1sk by the side of thebrake-wheel and adapted to turn therewith and to engage with thecone-clutches.

6. A variable-speed transmission mechanism, comprising a motor-shaft, asun gear' keyed thereto, an internal-toothed annular wheel .on the.other side of the sun-gear loosely mounted on the shaft, and having atubular sleeve, a plurality of lanet-gears mounted on loose stubshafts.t rough said brake-wheel, said planet-gears engaging with the sun andannular gears, coneand a clutch-disk slidably mounted on the sleeve ofthe brake-wheel and adapted to en age with the cone-clutches, as setforth.

. TUDSON H. BOUGHTONf Witnesses: ERNEST A. RABENER,

J. S. 'ZERB j on theother side of the sun-gear, loose on the gear on oneside, a sprocket-wheel, a braken testimony whereof I affix my signature1n presence of two wltnesses. 1

or holding the brake-Wheel from-rotation,

clutches on the outer ends of the stub-shafts,

IOC

